Back in 1980, one of my key methods to attract students to our Sydney studio was to stand on the stage in Hyde Park, and declare myself the ringmaster of a $100 competition. This was the most bizarre competition that anyone had heard or seen before, and I used to attract a large crowd of bemused onlookers, curious to discover the "trick" of my simple challenge.
To win, you just had to stand up from a chair without pulling your head back.